Congenital malformations of larynx (Q31) ICD-10-CM
The Q31 code range covers congenital malformations of larynx with 8 ICD-10-CM diagnosis codes. 7 of them are billable and valid for claim submission in fiscal year 2027, and the category headers group them but cannot themselves be billed.
Type 1 Excludes
A type 1 excludes note is a pure excludes note. It means "NOT CODED HERE!" An Excludes1 note indicates that the code excluded should never be used at the same time as the code above the Excludes1 note. An Excludes1 is used when two conditions cannot occur together, such as a congenital form versus an acquired form of the same condition.
- congenital laryngeal stridor NOS P28.89
Codes in the Q31 Range 8 codes · 7 billable
Clinical Terms in This Code Range
Definitions from the National Library of Medicine for conditions coded in the Q31 range.
Laryngocele
Congenital anomalous dilitation of the laryngeal saccule that may extend internally into the airway or externally through the thyrohyoid membrane.
Laryngomalacia
A congenital or acquired condition of underdeveloped or degeneration of CARTILAGE in the LARYNX. This results in a floppy laryngeal wall making patency difficult to maintain.
About the Q31 Code Range
These conditions affect the larynx, or voice box, and are present at birth.
The subdivisions distinguish a laryngeal web (Q31.0), subglottic narrowing (Q31.1), and an underdeveloped larynx (Q31.2). Separate codes identify laryngocele (Q31.3) and laryngomalacia (Q31.5). Other congenital malformations have Q31.8; an unspecified malformation has Q31.9.
Questions About This Page
How many billable codes are in the Q31 range?
Of the 8 codes in this range, 7 are billable and valid for claim submission from October 1, 2026 through September 30, 2027. Category header codes group them but cannot be reported on claims.
What does the Q31 range classify?
The range classifies congenital malformations of larynx. Each code links to its own reference page with billing status, MS-DRG grouping, coding notes, and clinical information.
Related References
Source: CMS FY 2027 ICD-10-CM Tabular List and order file, effective October 1, 2026 through September 30, 2027.
